add internal display in emg pro comment

ESPMegaPRO-firmware/lib/ESPMegaPRO/ESPMegaPRO_OOP.cpp

@@ -183,6 +183,7 @@ ExpansionCard* ESPMegaPRO::getCard(uint8_t slot) {
 /**
  * @brief Enables, Instanitates, and Initializes the internal display.
  * 
+ * @note &Serial is used for the internal display on ESPMegaPRO R3.
  * @note This function can only be called if the ESPMegaIoT module is enabled.
  * @note This function must be called before using the internal display.
  * 

ESPMegaPRO-firmware/lib/ESPMegaPRO/ESPMegaPRO_OOP.hpp

@@ -63,6 +63,11 @@ class ESPMegaPRO {
          * @note This card is installed by default at slot 1 on the ESPMegaPRO R3 board.
          */
         DigitalOutputCard outputs = DigitalOutputCard(PWM_BANK_ADDRESS);
+        /**
+         * @brief The Display Built-in to the ESPMegaPRO board.
+         * @typedef InternalDisplay
+         * @note SKU EMG-PRO-R3-XXX-(F)-(12/24)V does not have a built-in display.
+         */
         InternalDisplay *display;
         ESPMegaIoT *iot;
     private: